Be aware that the switch settings shown for the MF-100 in the Total Hardware 99 (TH99) database, are wrong.
The error is in the 'Installed memory address configuration' table (amount of RAM fitted to the MF-100).
Specifically, the row for '384KB' is wrong.
Instead of switches 4/5/6 being ON/ON/ON, they should instead be ON/ON/OFF